You can take a loog at GM862-GPRS ( www.gm862.com ). It has an EASY GPRS, which is basically the TCP/IP stack. There are some AT commands used to set the gprs parameters (APN, Username, pwd, peer name, protocol), and with the AT#SKTOP command you can open a socket. It is very easy to use. All the PPP protocols are inside the modem.
I'm using BENQ M22 modem, its said that it has inbuilt TCP/IP stack but nothing is mentioned about PPP stack; so i assume that PPP protocol has to be implemented by me.
I have to implement this protocol using 8-bit controller, please provide be with some practical suggestions and resources.
Not really,
basically when a gprs/modem maker offers his TCP/IP stacks, it means a modem capable to send GPRS packets over UDP or TCP conections, but using his own transfer/setup mechanism.
in order to use ppp, the TCP/Stack must reside on a host (i.e. external Microcontrolleror even tough a PC), this is who MUST make ALL the work.
kuldeep:
wich modem are you using ?, speaking in general all brands offers friendly methods to transfer data using its stack, all you need to do, is read the manual and then hands on !
alimog:
dialing only the *99# puts the modem (brand dependent) in data mode or start an GPRS conection,in response to this, u must B able to talk with your device to make the desired functionality !!!!